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Northern lights North Bay tonight

North Bay sits at 58°N magnetic latitude in northern Ontario - Kp 3 is enough from dark sites outside the city. Marten River Provincial Park 50 km north and the Lake Nipissing shoreline are the nearest dark sky positions. Best season: August to April.

Aurora visibility - North Bay

Unlikely tonight

Kp 1 is well below the Kp 3 threshold needed for aurora to be visible from North Bay.

Current Kp

of 9

Threshold for North Bay: Kp 3 Magnetic latitude: ~58°N Updated: 21 May, 06:18 UTC

↓ Bz — nT Solar wind — km/s Density — p/cm³ ☁ —%

Conditions right now: — Kp + Bz + solar wind + cloud + moon

7-day outlook for North Bay

Today

21 May

Quiet

Tomorrow

22 May

Quiet

Sat

23 May

Quiet

Sun

24 May

Quiet

Mon

25 May

Quiet

Tue

26 May

Quiet

Wed

27 May

Quiet

Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.

What Kp is needed here?

North Bay sits at a magnetic latitude of approximately 58°N. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach Kp 3 before the auroral oval expands far enough south to be visible from here.

At Kp 3, visibility is possible from North Bay but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.

Best dark sky sites near North Bay

Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.

Lake Nipissing North Shore

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Bortle Class 3 - Rural sky, good dark sky 20 km from North Bay - approximately 25 minute drive

The north shore of Lake Nipissing gives a clear northern horizon across the open water, reducing light pollution to the south and allowing a clean view of lower-altitude aurora arcs. Drive north of the city limits and find a lakeside pullout with minimal road lighting. On a Kp 3 night, a low arc above the tree line is the typical display. The lake reflection adds a foreground when aurora is bright enough to mirror on still water.

Marten River Provincial Park

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Bortle Class 2 - Excellent dark sky 50 km north of North Bay - approximately 40 minute drive

A small provincial park on the highway north toward Temiskaming. The campground has open clearings facing north with minimal ambient light from surrounding settlements. At 50 km from a city of 50,000, sky brightness is substantially lower than the lakeshore. On Kp 3-4 nights, aurora structure - bands and rays rather than just a diffuse glow - becomes visible from the campground clearings. The northern Ontario boreal forest provides a classic Canadian aurora silhouette.

Algonquin Provincial Park - Costello Creek

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Bortle Class 2 - Excellent dark sky 145 km south of North Bay - approximately 2 hour drive

Algonquin is Ontario's pre-eminent dark sky park and has been used for aurora photography for decades. Costello Creek on Highway 60 provides a wide clearing with a clear northern horizon. The park has almost no internal lighting. The drive south is a commitment on a marginal forecast night, but for Kp 4+ storms, Algonquin gives significantly darker skies than anywhere close to North Bay. The Wolf Howl Pond area and Mew Lake campground are alternative dark sky positions within the park.

Best time to see the northern lights in North Bay

North Bay's aurora season runs from late September through to March, when nights are long enough for truly dark skies. The equinox months, September and March, bring a natural boost in geomagnetic activity, making them statistically the best of the season. Summer months bring too much twilight for aurora to be visible at this latitude.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Activity peaks around the September and March equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. Events during these two windows tend to produce the strongest displays of the year for observers at North Bay's latitude.

April through August brings persistent astronomical twilight that washes out aurora completely. Even strong events (Kp 6+) remain invisible during this period because the sky never gets dark enough.

Other Canada aurora forecasts

← Canada overview

Sudbury

Unlikely

Northern Ontario, 58°N magnetic, Killarney Provincial Park

~58°N mag. lat. Kp 3

Thunder Bay

Unlikely

Northwestern Ontario, Lake Superior north shore

~57°N mag. lat. Kp 3-4

Ontario

Unlikely

Canada's most populous province - Killarney and Algonquin dark sky

~56°N mag. lat. Kp 4

Northern Lights Canada

Canada-wide aurora forecast hub.

Northern Lights Sudbury Tonight

Sudbury - Killarney Provincial Park dark sky, same Kp threshold.

Northern Lights Ontario

Ontario-wide aurora hub - Algonquin, Killarney, Lake Superior.

Northern Lights Thunder Bay Tonight

Thunder Bay - Lake Superior north shore dark sky.

What Is the Kp Index?

How Kp determines aurora visibility at 58°N magnetic latitude.

Common questions

Aurora watching in North Bay - dark sky sites, Kp thresholds, and the best season.

Can you see the northern lights from North Bay?

Yes, from dark sky sites north and west of the city during Kp 3+ storms. North Bay sits at 58°N magnetic latitude, placing it within reach of the auroral oval when geomagnetic activity is moderate. The city itself has light pollution that suppresses fainter displays, but driving 20-50 km north on Highway 11 toward Marten River or along the Lake Nipissing north shore gives substantially darker conditions. On Kp 4+ nights, aurora structure - bands and rays - becomes visible above the tree line.

What Kp is needed for aurora in North Bay?

Kp 3 from dark sites outside the city. At 58°N magnetic latitude, North Bay sees the auroral oval expand overhead during moderate geomagnetic storms. A faint arc may appear at Kp 2-3 from the darkest sites north of town. Kp 4+ brings visible structure with bands, rays, and colour. Kp 5+ produces reliable displays visible from the city outskirts without driving far. The Kp index (a global measure of geomagnetic activity on a 0-9 scale) is updated every 3 hours - check it before driving out.

What are the best dark sky sites near North Bay?

Marten River Provincial Park, 50 km north on Highway 11, is the best close-in option with Bortle 2 skies and open clearings. The Lake Nipissing north shore gives a dark water horizon within 20 km of the city. For a major storm, Algonquin Provincial Park - 145 km south - offers designated dark sky areas with some of the best skies in Ontario. The key is getting north of the city, away from its light dome, and finding a clear northern horizon.

How does North Bay compare to Sudbury for aurora?

Both cities sit at 58°N magnetic latitude and share essentially the same Kp threshold of 3. The practical difference is access to dark sky: Sudbury has Killarney Provincial Park about 70 km south, offering exceptional dark skies and a south Georgian Bay horizon. North Bay has Marten River 50 km north and Algonquin 145 km south. Neither city has a clear advantage in terms of aurora frequency - the choice comes down to which dark sky sites suit the observer.

When is the best time to see northern lights in North Bay?

August to April, with September and March the most geomagnetically active months statistically. Northern Ontario has adequate darkness from late August, and nights lengthen through winter to around 15 hours in December. The equinox effect - where the Russell-McPherron effect increases the frequency of geomagnetic storms around the equinoxes - makes September and March the most productive months. Avoid June and July when nights are too short for comfortable dark sky viewing.

Northern lights North Bay tonight

7-day outlook for North Bay

What Kp is needed here?

Best dark sky sites near North Bay

Best time to see the northern lights in North Bay

Other Canada aurora forecasts

Related pages

Common questions

Photograph the Aurora - Recommended Gear